Connect On premise back end system with Cloud Foundry

Hello Everyone,

Could someone please explain the steps to connect on-premise back end system with SAP Cloud Foundry sub account.

I have already checked this blog and not able to understand the concept with app router.

Do we have any other way?

https://blogs.sap.com/2017/07/13/part-2-how-to-use-the-sap-cloud-platform-connectivity-and-the-cloud-connector-in-the-cloud-foundry-environment/

Regards,

Mayank